Raised relief picture, Pan Am DC-8

This is a nice framed picture of a Pan Am DC-8. Measures about 19" x 15".
It is made in the raised relief method, the airplane and mountains below actually protrude from the surface. I've seen many maps and national park pictures done this way to show elevation changes in 3D, but haven't been able to find ant info on this print. Probably made in the early 1960's. The body of the aircraft raises about 1/2" from the background,
Anyone seen these before?